Car truck



Jan. 9, 1945.

' I INVEN. BYQM ff i HTTY.

Jan. 9, 1945.

n M. LIGHT GARTRUCK Filed ot. 1o, 1941 '5 Sh'eets-She'et 2 @YW w Jan. 9,1945.

D. M. LIGHT CAR TRUCK Filed octQlo. 1941 3 Sheets-Sheet 3 III ATTY.

Patented Jan. 9, 1945 UNITED sTArE Vsi PATENT Y fortioril cartl TRUCKDavid Light, Chicago, Ill., assignor to American Steel Foundries,Chicago, Ill., a corporan tioxli of New Jersey y Application October 10,1941, Serial No. 414,397 I 20 claims. (ci. 10s- 197) n i asmuch as thearrangement is similar at oppo- My invention relates to four wheelrailway car trucks and may be described as an improve-l ment on my novelquick wheel change type of four-wheel railway car truck as described andillustrated in my United States Patent No.'

may readily be assembled or dismantled aS may be required forvsuch quickwheel change.

site ends thereof.

Figure 2 is a fragmentary top plan view of the truckstructure shown inFigure 1, and Figure 3 is a sectional view therethrough, the sectionAbeing taken substantially in the transverse vertical plane bisectingthe truck and as indicated by the line 3-3 of Figure 1. y

Figure 4 is a fragmentary sectional view taken through the truck and'bolster assembly substanvtially in the longitudinal vertical planebisectling the side fraxnegand as indicated by the line A specificobject of my invention is to devise A different object of my inventionis to devise such a snubbing arrangement between a side frame andbolster wherein a plurality of shoesV may be mounted in each side frame,and said bolster may be afforded V-shaped friction surfaces at oppositesides thereof, one shoe'of each set having engagement with one face ofeach V-shaped friction surface.

A still different object of my invention 'is to devise a novel trucksuch as that above-mentioned wherein friction devices in the respectivecolumns will afford frictional as well as resilient resistance tolateral movements 'of the bolster with respect to the side frame.

Still another object of my invention is to devise a novel form yof cartruck wherein friction means may be applied to or dismantled from betaken up by replacement of said key.

4-4 of Figure 2. y

Figure 5 is a fragmentary sectional view through the truck structureshown in Figures 1 and 2, taken substantially in the horizontaltransverse plane'indicated by the line 5-5 of Figure l.

Figure 6 is an alternate sectional view corresponding substantially tothe view shown in Figure 4, but differing therefrom inthe manner ofmounting the friction shoes.

Figure 7 is ay sectional view comparable to that of Figure 5, takenthrough the lmodication shown in Figure `6 substantially in thehorizontal plane indicated by the line 'I--T of Figurei.

Figure 8 is a further sectional view comparable to that of Figure 6 butillustrating a modified arrangement for securing the spring plate orfollower associated with the friction shoes.

Figure 9 is a sectional view comparable to that of Figure 'Z takenthrough the modification of l v vention, the section being takensubstantially in My`invention further comprehends an arrangement such asthat just described wherein a single resilient means may be utilized tourge apart the friction shoes of each set whileV at the same time urgingsaid shoes into engagement with the friction surfaces of the bolster.

My invention contemplates such an arrangement as that described whereina follower member'may be mounted in each column of the side frame tofacilitate application or removal of the friction vshoes through theassociated column, said follower memberA being demountable for thatpurpose. v

In the drawings,

Figure 1 is a fragmentary side elevation ofa railway car truck embodyingmy invention, only one end of the truck structure being shown ina. planecomparable to that of Figure 4.

Figure 11 is a sectional view through the structure shown in Figure 10,the section being taken substantially in the horizontal plane indicatedby the line II---IIy of Figure 10, and Figure 12 is a fragmentaryelevational view of the friction shoe assembly associated with 'themodification illustrated in Figures 10 andv 11.

- Describing the structure-in detail and refer- -ring i'lrst to themodication illustrated in Figures- 1 to5 inclusive, my novel truckcomprises a truss type side frame having the compression member 2 andthe tension member 4, an inte- .ure 3, and said tension memberhavingbelow ysaid bolster opening a relatively shallow boxing alongitudinally arranged vertical central rib 24 cored away centrallythereof adjacent the opening 26 in said tension member (Figure 3). Thetop chord |6 may be widened beneath said bolster openin-gto define thespringv seat 28 for support of the spring group which may be seatedthereon, said spring group comprising a plurality of spring meansdiagrammatically indicated at 38, 38, said spring means being connedbetween the bottom spring plate 32 and top spring plate 34. The bottomspring plate may be positioned von the spring seat 28 by interlockingengagement with up-standing lugs-36, 36 integrally formed with the topchord of said tension member, and the top spring plate may be positionedwith respect to the superposed bolster generally designated 38, saidbolster having downwardly projecting inboard and outboard lugs as at 48and 42, and said top spring plate having upwardly projecting lugscooperating with recesses inthe bottom wall of said bolster as at 'I'helower portion of each column 8 conforms substantially to that of mynovel side frame structure described in detail in my Patent No.2,222,484, issued by the United States Patent Office November 19, 1940,said lower portion be ing of generally triangular form with a diagonalcentral web 46 merging with the top chord I6 of the tension member as at48 (Figure 1), said triangular portion comprising inboard and outboardside walls'58 and 52 each of which may be cored away as at 54 adjacentthe juncture of the column of the tension member and centrally thereof.At its upper end the web 46 is continuous with a horizontal transverseweb 56, the web 56 defining the bottom wall of the rectangular pocket 58formed in the upper portion of each column, the back wall of said pocketbeing de. fined by the vertical transverse web 68 at the margin of theadjacent window opening |8 and by the horizontal top transverse web 62which may be continued into the vertical transverse web 64 above thepocket 58 in manner well illustrated in the sectional view of Figure 4.The inboard and outboard walls of the pocket 58 may be continuous withthe inboard and outboard walls 58 and 52 of the column. Within eachpocket 68 may be housed a friction shoe 66, said shoe being a box-likestructure, rectangular in plan, (Figure 3) and having on its inner facethe cavity 68 with the central lug 18 forming positioning means for theresilient means or compression spring 12, the opposite face of which maybe positioned against the web 68 by the lug 14 thereon.

-The friction shoe 66 may have relatively close fit within the pocket 58and on its friction face may present a diagonally arranged flat surface'I8 for engagement as at 18 with the wear plate 88 which may be recessedin the side of the bolster and secured thereto in any convenient manneras by welding at 82, 82. The side wall of the bolster 38 is diagonallyarranged at an angle complementary to that assumed by the frictionsurface 'I6' of the friction shoe, as best seen in the sectional view ofFigure 4. Each side wallof the 4 bolster may be afforded some clearancefrom the adjacent column as seen at 84 (Figure 5), the box-section endof said bolster having a generally rectangular section and beingrelatively closely confined laterally within the bolster opening 8 andpositioned on the spring group therein in usual manner with normalclearance at the top of said bolster opening. The bolster 38 may have ateach side thereof a guide lug 88 slidably received in the vertical slot88 in the inboard bracket generally designated 88, said inboard brackethaving integrally formed therewith brake hanger means 82, all as moreparticularly described in my Patent No. 2,199,360, issued by the UnitedStates Patent Oillce April 30, 1940. The slot 88 is formed along thelower portion of each bracket 88, the upper extremity thereof beingindicated at 84 (Figure '3), said upper extremity being spaced asuillcient distance below the bottom web of the compression member 2 inorder to permit the insertion of the bolster 38 within the bolsteropening 8 for engagement with the lugs 88, 88 within the slots 88Without disturbing the spring group on which the bolster may be seatedand thus permitting a quick wheel change arrange-- ment, all as moreparticularly described in my said Patent No. 2,199,360.

In this arrangement it will readily be understood that the frictionshoes 66, 68 at opposite sides of the bolster afford a relatively largefriction surface for diagonal face engagement with the wear plates 88,88 on the respective side walls of the bolster, the end of the bolster38 thus being resiliently confined within the bolster opening 8 andtherein restrained against vertical or lateral movement relative to theassociated side frame. The friction shoes 66, 86 engaging the side wallsof the bolster will also afford some restraint against any tendency ofthe bolster to move out of square with the side frame inasmuch as suchout of square movement will tend to further compress the resilient means12. The amount of friction developed may be controlled by the characterof the resilient means 'I2 and the precompression thereof;

The modification illustrated in Figures 6 and 7 differs from that justdescribed in that each col umn generally designated |82 is formed at theupper end thereof with a rectangular window or opening |84 at theposition assumed by the pocket 68 in the previous modification, saidrectangular openings |84, |84 in the respective columns being alignedlongitudinally of the frame and extending entirely through therespective columns, thus affording means for removably mounting thereinfriction shoes similar to those described for the previous modification.In the modification now under consideration, each opening |84 may bedenned above and below by the transverse webs |86 and |88 and atopposite sides thereof by the inboard and outboard webs or walls ||8 andH2 of the column, said inboard wall I|0 being extended longitudinally ofthe frame in the flange ||4 in which may be cored a central opening ||8affording a toe holdv for a vpinch bar for a purpose hereafterdescribed. Housed within each opening |84 may be a friction shoe ||8generally similar to that of the modification previously described, saidfriction shoe being slidably received in the opening |84 and havingdiagonal flat friction face engagement as at |28 with the wear plate |22recessed in the side of the bolster |24 and secured thereto las at |28,|26. Partially housed within the friction shoe I|8 may be thecompression spring or rubber pad |28, the opposite face of which mayseat as at |38 against the follower or spring capv |32. The follower |32may have a rectangular form similar to that of the friction shoe, andsaid follower may be formed with a central lug |34 transversely slottedas at |88 for reception of the key |38, the ends of which may extendthrough aligned slots |48, |48 fnthe opposite walls of said follower andbe received in openings |42 and |44 formed respectively in the inboerdand outboard walls ofthe column. The key |38 may have notched engagementas at |48, |48 st theopposite ends thereof with lthe aligned openings|40, |40 in the follower. thus positioning said key with lrespect tosaid follower. p

In this arrangement the friction shoe H8 may be removed or applied inthe column without dis-- turbing the position of the bolster. This maybe done by assembling the shoe, the compression spring. and the followerin normal position and fulcruming a pinch bar in the opening H6 in theinboard wall of the column and bearing against I the follower lug |34,thus urging the follower into position'to permit application of thesecuring key |38. 4 In like manner a pinch bar may be utilized to removethe follower and shoe. It will be readily apparent to those skilled inthe art that when the friction shoe H8 has become Worn in use the slackmay be taken up by replacement of the key |38 with a similar keysomewhat thicker, said key thus functioning in the manner `of aj shim aswell as a key, and permitting control of the amount of compression ofthe resilient means |28 by selection of shim means as desired. e

In the modification illustrated in Figures 8 and 9 thearrangement issimilar to that of the modiflcation of-Figures 6 and 'I except for themanner of keying the follower. Inthe modification of Figures 8 and 9 thebolster 202is afforded a wear also have frictional engagement as at 3i4and M6 with the inboard and outboard walls tit. and 320 oi' the column322, said walls, together with the top and bottom transverse webs 324and 326 in said columns, defining the opening 328 within which saidshoes have slidable movement. Partially housed within the friction shoes3io and 3|2. at opposite aides of the opening 328, may be '330 connnedtherebetween is shown in Figure 12,

' the'fview thereof being taken from the bolster engaging side of saidshoes and showing the bolster engaging friction surfaces at 306 and 308.

In the modification now under consideration, the*A compression spring330 is confined between the spaced friction shoes 3 I 0 and 3 i 2 andthe follower 334 in 'such manner that said resilient pad 330 affords adirect force path from said follower to each friction shoe, and fromeach friction shoe to the other friction shoe, said resilient pad thusplate 204 for diagonal frictional engagement as i at 206 with thefriction shoe 208 which may be slidably received within the opening 2I0-in the column 2I2 in like-manner as that for the modi'- flcationillustrated in Figures 6 and 7. Spaced from the friction shoe 208 andalso slidably mounted in the opening'2l0` may be the follower 2i4, andbetween said follower and shoe may be positioned the compression spring2i6, said compression spring serving to urge said shoe into frictionalengagement with said bolster. The follower may be maintained in normalposition by means of the key 2|8, the inboard end of which may bepocketed as at 220 in the inboard wall 222 of the column 2|2, and theoutboard end of which -may extend through the aligned opening 224 in theoutboard wall 226 of said column,said key' extending through alignedopenings in y the inboard and outboard walls of the follower 2|4 andalso through the central lug 228 thereof. I'he friction device includingthe friction shoe, the compression spring, the follower, and the key,may be applied or removed in like manner as that described for themodification of Figures 6 and 7, a pinch bar fulcrum being afforded at230 in the inboard wall of the column for that purpose.. In

' this modification the key 2 I8 may be retained in position by a cotterkey or other convenient retaining means secured as at 232 in the lug 234-'on the outboard lface of the wall 226 of the column.

The modification illustrated in Figures l0 to 12 inclusive. differs fromthose just described in that a plurality of friction shoes are affordedat each side of the bolster. In the arrangement now under consideration,the bolster 302 may have the wear plate 304 recessed in the sidewallthereof, said wear plate having a shallow V horizontal section, thediverging diagonal faces of which may seat as at 306 and 308 against therespective inboard and outboard friction shoes 3l0and 3|2, said shoeshaving diagonal tapering friction engagement with said respective facesin manner clearly apparent from a consideration of Figures 10 and 1l.The friction shoes 8l0 and 3i2 may serving to urge the shoes apart intoengagement with the side walls of the column as well as serving to urgesaid shoes into frictional engagement.

with a gripping action which tends to prevent the.

bolsters assuming out of square relationship with the associated sideframe or to restore normal relationship if such out -oi? squarenessoccursl under service conditions.

It is to be understood that I do not wish to be limited by the exactembodiments of the device shown which are merely by way of illustrationand not limitation as various and other forms of the device will, ofcourse, be apparent to those skilled in thev art without departing fromthe spirit of the invention or the scope of -the claims.

I claim:

1. In a railway car truck, a side frame having top and bottom membersand spaced columns defining a bolster opening, a bolster ed resilientlysupported in said opening and presenting reversely diagonally arrangedfrictionrfaces on the opposite side walls thereof, openings in therespective columns of said frame aligned longitudinally thereof.friction means housed in .each of said openings in engagement with said'friction faces, each of said friction means comprising a plurality offriction shoes in frictional engagement with in the inboard and outboardwalls of the adjacent column and with the adjacent friction 'face ofsaid bolster, means for urging said friction shoes into i'rlctionalengagement therewith, said last-mentioned means comprising a follower,means securing said follower in said column, and

resilient means under compression .between said shoes .and follower,said resilient means being operative to urge said shoes vapart and tourge said shoes into engagement with the adjacent friction face onsaidebolster end.

2. In a railway car truck, a side frame having top and bottom membersand spaced columns defining a bolster opening, a bolster end resilientlysupported in said opening and presenting reversely diagonally arrangedfriction faces on the opposite siiie walls thereof, openings in therespective columns of said frame aligned longitudinally thereof,friction means housed in each of said openings in engagement with saidfriction faces, each of said friction means comprising aplurality offriction shoes in frictional engagement with .the inboard and outboardwalls of theadjacent supported in said opening and presenting reverselydiagonally arranged friction faces on the opposite side walls thereof,openings inthe respective columns of said frame aligned longitudinallythereof, friction means housed in each of said openings in engagementwith said friction faces, each of said friction means comprising aplurality of friction shoes in frictional engagement with the inboardand outboard wallsof the adjacent column and with the adjacent frictionface of said bolster, and means for urging said friction shoes intofrictional engagement therewith, said last-mentioned means comprisingfollower means adjustably keyed in said column.

4. In a railway car truck, a side frame having top and bottom membersand spaced columns deflning a bolster opening, a bolster end resilientlysupported in said opening and presenting reversely diagonally arrangedfriction faces on the opposite side walls thereof, openings in therespective columns of said frame aligned longitudinally thereof,friction means housed `in each of said openings in engagement with saidfriction faces, each of said friction means comprising a plurality offriction shoes in frictional engagement with the inboard and outboardwalls of the adjacent column and with the adjacent friction face of saidbolster, means'for urging said friction shoes into frictional engagementtherewith, said last-mentioned means comprising a follower adjustablypositioned in said column, and resilient means under compression betweensaid' shoes and follower, said resilient means affording a direct forcepath from each shoe to the adjacent shoe.

5. In a quick wheel change railway car truck, a side frame havingtension and compression members and spaced columns defining a bolsteropening, a bolster resiliently supported therein, said columns havingbolster guide meanscentrally positioned on the inboard faces thereof,and said bolster having guide lugs' on the opposite side walls thereofin cooperative engagement with said guide means, said bolster presentingin the opposite side walls thereof reversely arranged tapering V-shapedfriction surfaces, and friction means housed in the respective columnsin engagement with said surfaces, each of said friction means comprisinga plurality of friction shoes in frictional engagement respectively withthe inboard and outboard walls of the adjacent column and with theadjacent friction surface on said bolster, and a single resilient memberurging said shoes into engagement with said bolster andsaid inboard andoutboard walls.

6. In a railway car truck, a si'de frame having top and bottom membersand spaced columns descams ilning a bolster opening, a bolster endresiliently supported in said opening and presenting friction faces onthe opposite side walls thereof, openings in the respective columns ofsaid frame aligned longitudinally thereof, friction means housed in eachof said openings in engagement with said friction faces, each of saidfriction means comprising a plurality of friction shoes in frictionalengagement Vwith the inboard and outboard walls of the adjacent columnand with the adjacent friction faces of said bolster, means for urgingsaid friction shoes into frictional engagement therewith, saidlast-mentioned means comprising a follower keyed in said column, andresilient means under compression between said shoes and follower.

7. In a railway car truck. a side frame having top and bottom membersand spaced columns deflning a bolster opening, a bolster end resilientlysupported in said opening and presenting reversely diagonally arrangedfriction faces `on the opposite side walls thereof, openings in therespective columns of said frame aligned longitudinally thereof,friction means housed in each of said openings in engagement with saidfriction faces, each of said friction means comprising a plurality offriction shoes in frictional engagement with-the inboard and outboardwalls of the adjacent column and with the adjacent friction face of saidbolster, and means for urging said friction shoes into frictionalengagement therewith.

8. In a car truck, a side frame having top and bottom members and spacedcolumns defining a .bolster opening, a bolster end resiliently supportedin said opening, said bolster end having diagonally arranged side wallspresenting friction faces, friction means resiliently housed in saidcolumns in engagement with said faces, each of said friction meanscomprising a plurality of friction shoes having reversely arrangeddiagonal frictional engagement with the adjacent faces, a follower, andresilient means compressed between said shoes and follower and affordinga direct force path between each of said shoes and said follower wherebysaid shoes may be urged into frictional engagement with said frictionfaces on said bolster.

9. In a car truck, a side frame having top and bottom members and spacedcolumns defining a bolster opening, a bolster end resiliently supportedin said opening, said bolster end lhaving diagonally arranged side wallspresenting friction faces, friction means resiliently housed in saidcolumns in engagement with said faces, each of said friction meanscomprising a plurality of fricton shoes having reversely arrangeddiagonal frictional engagement with the adjacent faces, a follower, andresilient means compressed between said shoes and abutting saidfollower, said resilient means affording a direct force path between therespective shoes to urge said shoes into frictional engagement with theside walls of the adjacent column.

l0. In a railway car truck, a side frame having top and bottommembersand spaced columns defining a bolster opening and spaced windowopenings, a bolster end resiliently supported in said bolster openingand presenting reversely diagonally arranged friction faces on theopposite side walls thereof, openings in the respective columns of saidframe aligned longitudinally thereof, friction means housed in each ofsaid openings in engagement with said friction faces, each of saidfriction means comprising a follower removfriction faces, veach of saidfriction means being ably keyed lin the adjacent opening, a frictionshoe spaced from said follower and in frictional engagement with anadjacent friction face and a wall of the adjacent column, and resilientmeans compressed between saidl follower and said shoe and operable tourge said shoe into engagement with said last-mentioned face and wall. lt

1l. In a quick wheel change railway car truck,

a side frame having tension and compression'`V members and spacedcolumns defining a bolster opening, a bolster resiliently supportedtherein, said columns having bolster guide means centrally positioned onthe inboard faces thereof, 'and said bolster having guide lugs on theopposite side walls thereof in cooperative engagement'with said guidemeans, said bolster presenting in the opposite side walls thereofreversely arranged tapering V-shaped ,friction surfaces, and frictionmeans housed in the respective columns in engagement with' saidsurfaces.

12. In a car truck, a side frame having top and bottom members an'dspacedcolumns defining a bolster opening, a bolster end resilientlysupported in said opening, said bolster end having diag-- onallyarranged side walls presenting V-shaped friction faces, friction meansresiliently housed in said columns in engagement with said faces, eachof said friction means comprising a plurality of friction shoes havingreversely arranged diagonal removable from the adjacent column whilesaid bolster end remains resiliently supported in said 1 bolsteropening.

16. In a car truck, a sideframe having top and bottom members and spacedcolumns defining a tensionand compression members and spaced frictionalengagement with the adjacent faces, a l

follower, and resilient means compressed between said shoes andfollower, the friction shoes associated with each friction means bearingagainst spaced parallel walls of the associated column.

13. In a car truck, a side frame having top and bottom members andspaced'columns dening a bolster opening, a bolster endresiliently-supported in said opening, said bolster end havingdiagonally arranged side walls presentingy friction faces, alignedopenings in said columns, and friction means resiliently positioned insaid openings in engagement with said faces, each of said friction meanscomprising a frictionshoe, a spaced follower, and resilient means undercompression betweensaid shoe and follower, said friction means beingremovable from the associated column while said bolster end remainsresiliently supported in said side frame, said resillent-means beingoperable to urge said shoe into engagement with an adjacent frictionface and column wall.

14. In a car truck, a, side framehaving top and bottom members andspaced columns defining a bolster opening, a bolster end resilientlysupported in said opening, said bolster end having diagonally arrangedside walls presenting friction faces, and friction means resilieritlyhoused in said columns in engagement with-said faces, each of saidfriction' means comprising a plurality of friction shoes respectivelyengaging spaced parallel walls of lthe ,adjacent column and havingreversely arranged diagonal frictional vengagement with the adjacentfaces.

l5. In a railway car truck, a side frame having top and bottom membersand spaced columns defining a bolster opening, a bolster end resil-"iently supported in said opening and presenting t reversely diagonallyarranged V-shaped frictionv faces on the opposite side walls thereof,openings inthe respective columns of said frame aligned longitudinallythereof, and friction means housed in each of said openings inengagement with said columns defining a bolster opening and spacedwindow openings, resilient means on said tension member in said opening,a bolster supported on said resilient means and presenting V-shapedfriction faces adjacent said columns, and friction means housed in eachof said columns, each comprising a plurality of friction shoesyengaging-the adjacent bolster. faces and respectively engaging spacedparallel walls of the adjacent column, and a single resilient memberoperable to urge said shoes against the adjacent bolster face andagainst the respective walls of the adjacent column.

18. In a railway car truck, a side frame having tension `andcompressionmembers and spaced columns defining a bolster opening, spaced windowopenings, resilient means on said tension member in saidvbolster-opening, a bolster supported thereon with V-shaped frictionfaces adjacent said columns, and a friction device in each columncomprising a plurality of friction shoes engaging the adjacent bolsterfaces and in frictional engagement respectively with inboard andoutboard friction faces on the adjacent column,

dow openings, resilient means on said tension member in, said bolsteropening, a bolster supported thereon with V-shaped friction facesadjacent respective columns, aligned windows in said columns and afriction device in each column window comprising a plurality of frictionshoes engaging the adjacent bolster faces and in frictional engagementrespectively with inboard and outboard frictionfaces on the adjacentcolumn, each of said devices being removable from the associated windowwhile said bolster remains positioned in said bolster opening on saidresilient means. l

20. In a car truck, a truss type supporting member having spaced columnswith aligned openings therethrough. a supported member having an endresiliently positioned between said columns with friction faces adjacentsaid openings, land friction means in each opening including frictionshoes and a resilient member operable to urge said shoes against saidface and respectively against opposite walls of said column opening.'

. DAVID M. LIGHT.

